'use client';

import { useState, useEffect } from 'react';
import { Button } from '@/components/ui/button';
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogFooter,
  DialogHeader,
  DialogTitle,
} from '@/components/ui/dialog';
import { Input } from '@/components/ui/input';
import { Label } from '@/components/ui/label';
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from '@/components/ui/select';
import { toast } from 'sonner';

interface SectionDialogProps {
  open: boolean;
  onOpenChange: (open: boolean) => void;
  projectId: string;
  domainId: string;
  onCreated: () => void;
}

export function SectionDialog({
  open,
  onOpenChange,
  projectId,
  domainId,
  onCreated,
}: SectionDialogProps) {
  const [name, setName] = useState('');
  const [kind, setKind] = useState<'section' | 'milestone'>('section');
  const [status, setStatus] = useState<'planned' | 'in_progress' | 'complete'>('planned');
  const [targetDate, setTargetDate] = useState('');
  const [submitting, setSubmitting] = useState(false);
  const [error, setError] = useState('');

  useEffect(() => {
    if (open) {
      setName('');
      setKind('section');
      setStatus('planned');
      setTargetDate('');
      setError('');
    }
  }, [open]);

  async function handleSubmit(event: React.FormEvent<HTMLFormElement>) {
    event.preventDefault();
    if (!name) {
      setError('Name is required');
      return;
    }
    setSubmitting(true);
    setError('');

    const body: Record<string, unknown> = { name, kind, status };
    if (targetDate) body.targetDate = new Date(targetDate).toISOString();

    try {
      const response = await fetch(`/api/domains/${domainId}/projects/${projectId}/sections`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(body),
      });

      if (!response.ok) {
        const err = await response.json();
        throw new Error(err.error?.message || 'Unable to create section');
      }

      toast.success('Section created');
      onOpenChange(false);
      onCreated();
    } catch (err) {
      setError(err instanceof Error ? err.message : 'Unable to create section');
    } finally {
      setSubmitting(false);
    }
  }

  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      <DialogContent className="sm:max-w-[450px]">
        <DialogHeader>
          <DialogTitle>New Section</DialogTitle>
          <DialogDescription>Add a section or milestone to organize tasks.</DialogDescription>
        </DialogHeader>
        <form className="space-y-4" onSubmit={handleSubmit}>
          <div className="space-y-2">
            <Label htmlFor="section-name">Name *</Label>
            <Input
              id="section-name"
              value={name}
              onChange={(e) => setName(e.target.value)}
              placeholder="e.g. Backend, Design, Launch"
              autoFocus
              required
            />
          </div>

          <div className="grid grid-cols-2 gap-4">
            <div className="space-y-2">
              <Label htmlFor="section-kind">Kind</Label>
              <Select value={kind} onValueChange={(v) => setKind(v as any)}>
                <SelectTrigger id="section-kind">
                  <SelectValue />
                </SelectTrigger>
                <SelectContent>
                  <SelectItem value="section">Section</SelectItem>
                  <SelectItem value="milestone">Milestone</SelectItem>
                </SelectContent>
              </Select>
            </div>

            <div className="space-y-2">
              <Label htmlFor="section-status">Status</Label>
              <Select value={status} onValueChange={(v) => setStatus(v as any)}>
                <SelectTrigger id="section-status">
                  <SelectValue />
                </SelectTrigger>
                <SelectContent>
                  <SelectItem value="planned">Planned</SelectItem>
                  <SelectItem value="in_progress">In Progress</SelectItem>
                  <SelectItem value="complete">Complete</SelectItem>
                </SelectContent>
              </Select>
            </div>
          </div>

          <div className="space-y-2">
            <Label htmlFor="section-target-date">Target date</Label>
            <Input
              id="section-target-date"
              type="date"
              value={targetDate}
              onChange={(e) => setTargetDate(e.target.value)}
            />
          </div>

          {error && <p className="text-sm text-destructive" role="alert">{error}</p>}

          <DialogFooter>
            <Button type="button" variant="outline" onClick={() => onOpenChange(false)}>
              Cancel
            </Button>
            <Button type="submit" disabled={submitting || !name}>
              {submitting ? 'Creating...' : 'Create Section'}
            </Button>
          </DialogFooter>
        </form>
      </DialogContent>
    </Dialog>
  );
}